I've been meaning to get on here and make some Corrections about my assumptions.
Couple of days after I made this post I did some further looking into it.
There was some miscommunication errors over the phone and initially.
The part that they were replacing was not a PCV, but if they were adding a PVC cover to attempt to prevent corrosion.
Not to say that everything clear and good but to their credit business has tried to call and email me on several occasions to see if I had any questions or concerns. Lacking an interest in talking with them I've just ignored it.
View my fuel log 2014 Mirage 1.2 automatic: 36.7 mpg (US) ... 15.6 km/L ... 6.4 L/100 km ... 44.1 mpg (Imp)